EP1520534B1 - Instrument for preparation of a bone for an interference screw in ligament surgery - Google Patents

Instrument for preparation of a bone for an interference screw in ligament surgery Download PDF

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Publication number
EP1520534B1
EP1520534B1 EP04021515A EP04021515A EP1520534B1 EP 1520534 B1 EP1520534 B1 EP 1520534B1 EP 04021515 A EP04021515 A EP 04021515A EP 04021515 A EP04021515 A EP 04021515A EP 1520534 B1 EP1520534 B1 EP 1520534B1
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EP
European Patent Office
Prior art keywords
screw
instrument
tap
interference
instrument according
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Not-in-force
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EP04021515A
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German (de)
French (fr)
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EP1520534A1 (en
Inventor
Michel Desarnaud
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MICHEL DESARNAUD
Zimmer France SAS
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Zimmer France SAS
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G5/00—Thread-cutting tools; Die-heads
    • B23G5/02—Thread-cutting tools; Die-heads without means for adjustment
    • B23G5/06—Taps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1655—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for tapping
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/17—Guides or aligning means for drills, mills, pins or wires
    • A61B17/1714—Guides or aligning means for drills, mills, pins or wires for applying tendons or ligaments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/17—Guides or aligning means for drills, mills, pins or wires
    • A61B17/1739—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
    • A61B17/1764—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the knee

Definitions

  • Such an instrument is indispensable for the fixation technique applicable for the reconstruction of intra-articular ligaments but can also be used for fixation and reconstruction of tendons and extra-articular ligaments.
  • the interference screws are made of absorbable material or not, more or less fragile, there are taps adapted to the thread of the screw to facilitate the insertion thereof.
  • the difficulty which is not solved by the aforementioned document US 2003/0018337, is essentially due to the fact that during the screwing of the interference screw, it causes rotation by driving the ligament or tendon in the tunnel which is unequal, depending on the diameters of all the components present and on the operated side (right femur or left femur).
  • a first phase of the inventive step it has been sought an instrument that allows to calibrate and position the tunnels for receiving the ligaments or grafts and to maintain the position of these during the screwing of the interference screw.
  • the present invention aims to overcome the various disadvantages known in the prior art and cited above.
  • Such an instrument according to the invention makes it possible to avoid, that at the time of the actual screwing of the interference screw, it can cause in its threading the ligament (s) or graft (s).
  • the instrument 1 generally designated in the figures, which is the subject of the invention, is characterized in that the lateral portion 1a of its boring part capable of preparing the location of the interference screw 7 has at least one one of its generatrices, a longitudinal recess 2, 3 open towards the outside, forming a guide for drilling in the articulation 4 of a tunnel 5, 6 substantially semicylindrical whose position for a piercing secant with the
  • the location with the screw 7 is determined by the time position of said instrument 1, so as to first prepare the location of the interference screw 7 and in a second step, by secant drilling the tunnel 5, 6 for to receive a ligament or graft 8, 9, in order to avoid the rotation of the latter by driving, during the screwing of the interference screw 7, while allowing immobilization in place of said ligament 8, 9 by the screw 7.
  • the drilling part of the instrument 1 is constituted by a tap, surmounted by a removable handle 10 in which the recesses 2, 3 open in the form of two holes 2a, 3a of the diameter of the tunnels 5, 6 to be produced later in the articulation 4, such a handle 10 allowing both rotating the tap 1 to a predetermined depth and engaging a drill bit 11 in each of the holes 2a, 3a to provide said tunnels 5, 6 at angularly spaced locations, also in a predetermined manner.
  • the tap may be of varying diameter and length, depending on the case to be treated.
  • the interference screw 7 is made of a resorbable or non-absorbable material.
  • the longitudinal recesses 2, 3 and the holes above them 2a, 3a are drilled in the body of the tap for the purpose of optimized ergonomics.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Mechanical Engineering (AREA)
  • Rheumatology (AREA)
  • Surgical Instruments (AREA)
  • Prostheses (AREA)

Abstract

The tool has a lateral part (1a) comprising longitudinal recesses (2, 3) opening towards outside to form a guide for drilling in a joint of tunnels. Drilled position of the tunnel intersecting with position of an interference screw is determined by scheduled position of the tool. The positions are determined to prepare the screw position and to drill the tunnel for receiving a ligament and graft in respective stages.

Description

La présente invention concerne un instrument destiné à la mise en place de vis d'interférence dans le domaine de la ligamentoplastie.The present invention relates to an instrument for the placement of interference screws in the field of ligamentoplasty.

Un tel instrument est indispensable à la technique de fixation applicable pour la reconstruction de ligaments intra-articulaires mais peut être utilisé également pour la fixation et la reconstruction de tendons et de ligaments extra-articulaires.Such an instrument is indispensable for the fixation technique applicable for the reconstruction of intra-articular ligaments but can also be used for fixation and reconstruction of tendons and extra-articular ligaments.

Pour cela, il est connu, par le document US 2003/0018337 (le préambule de la revendication 1 est basé sur ce document), un instrument destiné à préparer le logement de la vis d'interférence et du ligament ou greffon dans le but de fixer celui-ci dans la chirurgie de la reconstruction ligamentaire.For this, it is known from US 2003/0018337 (the preamble of claim 1 is based on this document), an instrument for preparing the housing of the interference screw and the ligament or graft for the purpose of to fix this one in the surgery of the ligament reconstruction.

Il est donc connu, selon la technique actuelle, de percer un trou ou tunnel du diamètre du ligament ou greffon et à fixer celui-ci par l'insertion de vis d'interférence exerçant une action entre la paroi du tunnel et ledit ligament.It is therefore known, according to the current technique, to drill a hole or tunnel of the diameter of the ligament or graft and to fix it by the insertion of interference screws exerting an action between the tunnel wall and said ligament.

Les vis d'interférence étant en matériau résorbable ou non, plus ou moins fragile, il existe des tarauds adaptés au filetage de la vis pour faciliter l'insertion de celle-ci.Since the interference screws are made of absorbable material or not, more or less fragile, there are taps adapted to the thread of the screw to facilitate the insertion thereof.

La mise en place de la vis d'interférence dans le tunnel formé par un trou borgne fémoral ou dans un trou borgne tibial est donc délicate.The establishment of the interference screw in the tunnel formed by a femoral blind hole or in a tibial blind hole is therefore delicate.

La difficulté, qui n'est pas résolue par le document US 2003/0018337 précité, tient essentiellement au fait que lors du vissage de la vis d'interférence, celle-ci provoque une rotation par entraînement du ligament ou tendon dans le tunnel qui est inégale, en fonction des diamètres de tous les composants en présence et du côté opéré (fémur droit ou fémur gauche).The difficulty, which is not solved by the aforementioned document US 2003/0018337, is essentially due to the fact that during the screwing of the interference screw, it causes rotation by driving the ligament or tendon in the tunnel which is unequal, depending on the diameters of all the components present and on the operated side (right femur or left femur).

En fait, il a été constaté que de manière régulière, le greffon tourne partiellement avec la vis d'interférence ce qui induit une mauvaise position et par la même, une moins bonne isométrie.In fact, it has been found that regularly, the graft rotates partially with the interference screw which induces a bad position and by the same, a less good isometry.

Il faut savoir que la précision attendue dans ce type d'opération est de l'ordre du demi millimètre ou du millimètre, mais qu'en cas de rotation du greffon l'erreur de positionnement peut avoisiner 3 à 5 mm.It should be known that the accuracy expected in this type of operation is of the order of half millimeter or millimeter, but that in case of rotation of the graft, the positioning error can be around 3 to 5 mm.

Selon une première phase de la démarche inventive, il a été recherché un instrument qui permet de calibrer et de positionner les tunnels destinés à recevoir les ligaments ou greffons et de conserver la position de ceux-ci lors des vissages de la vis d'interférence.According to a first phase of the inventive step, it has been sought an instrument that allows to calibrate and position the tunnels for receiving the ligaments or grafts and to maintain the position of these during the screwing of the interference screw.

La standardisation du diamètre du logement influe directement sur l'efficacité de la fixation.The standardization of the housing diameter has a direct influence on the effectiveness of the fixation.

Selon les techniques opératoires plastiques connues, l'instrument consiste en un taraud qui a pour effet de préparer le futur trajet de la vis d'interférence afin de diminuer le couple de frottement, mais en aucun cas ce taraud connu permet d'éviter les phénomènes de glissement des greffons, provoquant leur rotation, comme évoqué ci-dessus.According to the known plastic operating techniques, the instrument consists of a tap which has the effect of preparing the future path of the interference screw in order to reduce the torque of friction, but in no case this known tap avoids the phenomena of sliding grafts, causing their rotation, as mentioned above.

La présente invention a pour but de remédier aux différents inconvénients connus dans l'art antérieur et ci-dessus cités.The present invention aims to overcome the various disadvantages known in the prior art and cited above.

A cet effet, elle concerne un instrument destiné à la mise en place de vis d'interférence dans le domaine de la ligamentoplastie intra-articulaires ou extra-articulaires, et comportant à son extrémité une partie foreuse apte à la préparation de l'emplacement de la vis d'interférence, caractérisé en ce que la partie latérale de sa partie foreuse, comporte sur au moins l'une de ses génératrices, un évidement longitudinal ouvert vers l'extérieur, formant un guide destiné au perçage dans l'articulation d'un tunnel sensiblement hémicylindrique.For this purpose, it relates to an instrument intended for the establishment of interference screws in the field of intra-articular or extra-articular ligamentoplasty, and having at its end a boring part suitable for the preparation of the location of the interference screw, characterized in that the lateral portion of its drilling part, comprises on at least one of its generatrices, a longitudinal recess open towards the outside, forming a guide for drilling into the joint of a substantially hemicylindrical tunnel.

Il est ainsi possible de réaliser à l'identique des tunnels pour le logement d'un ou plusieurs faisceaux fémoral ou pour la partie tibiale de la reconstruction, mais aussi pour toute fixation tendino-osseuse dans tout type d'articulation.It is thus possible to make identical tunnels for housing one or more femoral bundles or for the tibial portion of the reconstruction, but also for any tendino-bone fixation in any type of joint.

Un tel instrument selon l'invention permet d'éviter, qu'au moment du vissage proprement dit de la vis d'interférence, celle-ci puisse entraîner dans son filetage le ou les ligament(s) ou greffon(s).Such an instrument according to the invention makes it possible to avoid, that at the time of the actual screwing of the interference screw, it can cause in its threading the ligament (s) or graft (s).

Cette description donnée à titre d'exemple non limitatif, fera mieux comprendre comment l'invention peut être réalisée en référence aux dessins annexés sur lesquels :

  • La figure 1 représente en perspective un instrument selon l'invention constitué par l'instrument, en l'occurrence un taraud, pour la préparation d'un trou borgne fémoral ou tibial.
  • La figure 2 représente en perspective un outil de perçage pour la réalisation de tunnels sécants au trou borgne fémoral ou tibial, préparé par ledit taraud.
  • La figure 3 est une vue en plan du taraud selon la figure 1.
  • La figure 4 est une vue en perspective à échelle agrandie de l'extrémité du taraud, selon les figures 1 et 3.
  • La figure 5 est une vue en coupe selon la ligne V, V du taraud selon la figure 3.
  • La figure 6 est une vue de dessus selon la figure 3.
  • La figure 7 est une vue de dessous selon la figure 3.
  • La figure 8 est une vue en perspective d'un genou ayant fait l'objet d'une reconstruction de ligaments intra-articulaires.
This description given by way of nonlimiting example, will better understand how the invention can be made with reference to the accompanying drawings in which:
  • FIG. 1 represents in perspective an instrument according to the invention constituted by the instrument, in this case a tap, for the preparation of a femoral or tibial blind hole.
  • FIG. 2 is a perspective view of a piercing tool for producing secant tunnels at the femoral or tibial blind hole, prepared by said tap.
  • FIG. 3 is a plan view of the tap according to FIG.
  • Figure 4 is an enlarged perspective view of the end of the tap, according to Figures 1 and 3.
  • FIG. 5 is a sectional view along line V, V of the tap according to FIG. 3.
  • FIG. 6 is a view from above according to FIG.
  • FIG. 7 is a view from below according to FIG.
  • Figure 8 is a perspective view of a knee having been reconstructed intra-articular ligaments.

L'instrument 1 désigné globalement sur les figures, objet de l'invention, se caractérise en ce que la partie latérale la de sa partie foreuse apte à la préparation de l'emplacement de la vis d'interférence 7, comporte sur au moins l'une de ses génératrices, un évidement longitudinal 2, 3 ouvert vers l'extérieur, formant un guide destiné au perçage dans l'articulation 4 d'un tunnel 5, 6 sensiblement hémicylindrique dont la position en vue d'un perçage sécant avec l'emplacement avec la vis 7 est déterminé par la position horaire dudit instrument 1, de manière à préparer dans un premier temps l'emplacement de la vis d'interférence 7 et dans un deuxième temps, par perçage sécant le tunnel 5, 6 destiné à recevoir un ligament ou greffon 8, 9, afin d'éviter la rotation de ce dernier par entraînement, lors du vissage de la vis d'interférence 7, tout en autorisant l'immobilisation en place dudit ligament 8, 9 par la vis 7.The instrument 1 generally designated in the figures, which is the subject of the invention, is characterized in that the lateral portion 1a of its boring part capable of preparing the location of the interference screw 7 has at least one one of its generatrices, a longitudinal recess 2, 3 open towards the outside, forming a guide for drilling in the articulation 4 of a tunnel 5, 6 substantially semicylindrical whose position for a piercing secant with the The location with the screw 7 is determined by the time position of said instrument 1, so as to first prepare the location of the interference screw 7 and in a second step, by secant drilling the tunnel 5, 6 for to receive a ligament or graft 8, 9, in order to avoid the rotation of the latter by driving, during the screwing of the interference screw 7, while allowing immobilization in place of said ligament 8, 9 by the screw 7.

Selon les présents exemples de réalisation, l'instrument 1 comporte sur une seconde génératrice, diamétralement opposée à la première, un évidement longitudinal 2, 3 ouvert vers l'extérieur, pour former deux guides destinés au perçage de deux tunnels 5, 6 sensiblement hémicylindriques, leur position relative étant déterminée par une première position horaire de l'instrument 1 lors d'un premier perçage et par une deuxième position horaire du même instrument 1 lors d'un second perçage, de manière à déterminer l'emplacement et la réalisation desdits tunnels 5, 6 en vue de la mise en place ultérieure de deux ligaments 8, 9, selon des emplacements choisis et de leur immobilisation à l'aide d'une seule vis d'interférence 7.According to the present examples of embodiment, the instrument 1 comprises on a second generatrix, diametrically opposed to the first, a longitudinal recess 2, 3 open towards the outside, to form two guides for the drilling of two substantially hemicylindrical tunnels 5, 6 , their relative position being determined by a first time position of the instrument 1 during a first piercing and by a second time position of the same instrument 1 during a second piercing, so as to determine the location and the realization of said tunnels 5, 6 in view of the subsequent placement of two ligaments 8, 9, in selected locations and their immobilization with a single interference screw 7.

Ceci a pour effet de diminuer la quantité de matériaux résorbables ou non implantée, comparée à une technique à deux faisceaux fixés par deux vis d'interférence au niveau fémoral selon l'art antérieur.This has the effect of reducing the amount of resorbable or non-implanted material, compared to a two-beam technique fixed by two femoral level interference screws according to the prior art.

En fait, l'espacement entre les tunnels 5, 6 destiné à la mise en place de deux ligaments fémoraux 8, 9 est maîtrisé par l'intermédiaire de l'instrument 1 à deux évidements longitudinaux 2, 3.In fact, the spacing between the tunnels 5, 6 intended for the placement of two femoral ligaments 8, 9 is controlled by means of the instrument 1 with two longitudinal recesses 2, 3.

C'est la rotation de l'instrument 1 qui défini le bon positionnement des tunnels 5, 6 à réaliser.It is the rotation of the instrument 1 which defines the good positioning of the tunnels 5, 6 to be realized.

L'éloignement de ses tunnels est défini par la position horaire de l'instrument lors des perçages.The distance from its tunnels is defined by the hourly position of the instrument during drilling.

Ceux-ci sont à égale distance du centre des vis et la distance par rapport à la cortical est donnée par l'utilisation d'un viseur fémoral décalé à 7, 8 ou 9 mm, connu dans l'art antérieur.These are equidistant from the center of the screws and the distance to the cortical is given by the use of a femoral viewfinder shifted to 7, 8 or 9 mm, known in the prior art.

Selon une autre caractéristique de l'invention, la partie foreuse de l'instrument 1 est constitué par un taraud, surmonté par une poignée amovible 10 dans laquelle débouche les évidements 2, 3 sous forme de deux trous 2a, 3a du diamètre des tunnels 5, 6 à réaliser ultérieurement dans l'articulation 4, une telle poignée 10 permettant à la fois l'actionnement en rotation du taraud 1 selon une profondeur prédéterminée et l'engagement d'un outil de forage 11 dans chacun des trous 2a, 3a afin de réaliser lesdits tunnels 5, 6 selon des emplacements espacés angulairement, également de manière prédéterminée.According to another characteristic of the invention, the drilling part of the instrument 1 is constituted by a tap, surmounted by a removable handle 10 in which the recesses 2, 3 open in the form of two holes 2a, 3a of the diameter of the tunnels 5, 6 to be produced later in the articulation 4, such a handle 10 allowing both rotating the tap 1 to a predetermined depth and engaging a drill bit 11 in each of the holes 2a, 3a to provide said tunnels 5, 6 at angularly spaced locations, also in a predetermined manner.

Ainsi, et comme déjà évoqué les trous 2a, 3a sont réalisés dans la poignée 10 du taraud 1 à égale distance du centre de celui-ci, d'où du centre de la vis d'interférence 7 à mettre en place ultérieurement.Thus, and as already mentioned, the holes 2a, 3a are made in the handle 10 of the tap 1 equidistant from the center of the latter, from where the center of the interference screw 7 to be put in place later.

Les diamètres des trous 2a, 3a réalisés dans la poignée 10 du taraud 1 et le diamètre des évidements hémicylindrique 2, 3 qui les prolongent sont de valeurs différentes en fonction du cas à traiter.The diameters of the holes 2a, 3a made in the handle 10 of the tap 1 and the diameter of the semicylindrical recesses 2, 3 which extend them are of different values depending on the case to be treated.

Bien entendu, le taraud pourra être de diamètre et de longueur variables, en fonction du cas à traiter.Of course, the tap may be of varying diameter and length, depending on the case to be treated.

Par ailleurs, le perçage du tunnel hémicylindrique 5, 6 est réalisé à l'aide d'un outil de forage 11, mèche ou dilatateur, comportant une butée de fin de forage 12 et/ou une graduation.Moreover, the drilling of the hemi-cylindrical tunnel 5, 6 is carried out using a drilling tool 11, wick or dilator, comprising an end-of-boring stopper 12 and / or a graduation.

Egalement, la vis d'interférence 7 est réalisée en un matériau résorbable ou non résorbable.Also, the interference screw 7 is made of a resorbable or non-absorbable material.

La partie supérieure de la poignée pourra également comporter des indications 12 indiquant par exemple qu'un tour de taraud correspond à un enfoncement de 2,5mm.The upper part of the handle may also include indications 12 indicating for example that a round of tap corresponds to a depression of 2.5mm.

En résumé, le taraud 1 doit permettre, par l'intermédiaire de la poignée 10 percée de deux trous 2a, 3a, se prolongeant sur toute la longueur du taraud 1 par les évidements 2, 3 :

  • de visser le taraud 1 dans un trou borgne préalablement réalisé dans l'articulation 4, en creusant le filet de la vis d'interférence 7,
  • une fois le taraud 1 introduit dans le condyle, il est possible d'engager un outil de forage pouvant être en butée ou graduée, afin de préparer les tunnels 5, 6 des ligaments 8, 9 correspondants aux faisceaux fémoraux.
In summary, the tap 1 must allow, through the handle 10 pierced with two holes 2a, 3a, extending over the entire length of the tap 1 through the recesses 2, 3:
  • to screw the tap 1 into a blind hole previously made in the hinge 4, by digging the thread of the interference screw 7,
  • once the tap 1 introduced into the condyle, it is possible to engage a drilling tool that can be abutment or graduated, to prepare the tunnels 5, 6 ligaments 8, 9 corresponding to the femoral bundles.

Les évidements longitudinaux 2, 3 ainsi que les trous les surmontant 2a, 3a sont percés dans le corps du taraud dans le but d'une ergonomie optimisée.The longitudinal recesses 2, 3 and the holes above them 2a, 3a are drilled in the body of the tap for the purpose of optimized ergonomics.

Il est possible d'avoir une poignée 10 amovible afin de faciliter la mise en place des outils de forage 11.It is possible to have a removable handle 10 to facilitate the installation of drilling tools 11.

Il est possible d'avoir des évidements 2, 3 non rétentifs, semi-rétentifs ou complètement rétentifs.It is possible to have recesses 2, 3 that are non-retentive, semi-retentive or completely retentive.

Il est également possible d'avoir un filet de taraud taraudant ou auto-taraudant.It is also possible to have a tap thread or self-tapping thread.

Il est possible également d'utiliser un instrument qui ne soit pas un taraud, en fait, un instrument de perçage tel qu'un foret ou des dilatateurs, tout comme il est possible de réaliser un instrument monobloc incluant un impacteur dilatateur monobloc pour réaliser les trois perçages simultanément à savoir : les deux tunnels 5, 6 ; et le trou borgne constituant l'emplacement de la vis d'interférence 7.It is also possible to use an instrument that is not a tap, in fact, a drilling instrument such as a drill or dilators, just as it is possible to make a monobloc instrument including a monobloc dilator impactor to achieve the three holes simultaneously namely: the two tunnels 5, 6; and the blind hole constituting the location of the interference screw 7.

Le taraud 1 tel que décrit ci-dessus peut avoir des diamètres variables avec des trous destinés à des greffons de diamètres différents.The tap 1 as described above may have variable diameters with holes for grafts of different diameters.

Par exemple, un taraud de diamètre 7mm sera muni de deux trous destinés au logements des greffons de diamètres 4mm - 5mm.For example, a tap diameter 7mm will be provided with two holes for housing grafts diameter 4mm - 5mm.

La facilité avec laquelle la vis 7 peut être introduite dans le trou borgne qui lui est destiné peut même amener le chirurgien a changer la taille de la vis 7.The ease with which the screw 7 can be inserted into the blind hole intended for it can even cause the surgeon to change the size of the screw 7.

Ainsi, il lui est possible de surdimensionner la vis d'un ou deux millimètres.Thus, it is possible to oversize the screw by one or two millimeters.

Par exemple une vis de 8mm sur un taraudage de 7mm ou une vis de 9mm sur un taraudage à 8mm, ceci pour améliorer la stabilité primaire en fonction de la densité osseuse rencontrée.For example an 8mm screw on a 7mm thread or a 9mm screw on an 8mm thread, this to improve the primary stability according to the bone density encountered.

Claims (6)

  1. Instrument (1) for placement of interference screws (7) in intra -articular or extra -articular ligament surgery, comprising, at its end, a drill part for preparing the site for the interference screw (7), characterized in that the lateral part (1a) of its drill part has, on at least one of its generatrices, a longitudinal recess (2, 3) opening towards the outside and forming a guide for boring a substantially semicylindrical tunnel (5, 6) on the periphery of the site intended for the interference screw.
  2. Instrument according to Claim 1, characterized in that it comprises , on a second generatrix diametrically opposite to the first one, a second longitudinal recess (3, 2) opening towards the outside in order to form a second guide for boring a second substantially semicylindrical tunnel (6, 5) .
  3. Instrument according to Claim 2, characterized in that its drill part is composed of a screw tap (1) surmounted by a movable handle (10) in which the recesses (2, 3) open out in the form of two ho les (2a, 3a) with the diameter of the tunnels (5, 6) that are to be produced subsequently on the periphery of the site intended for the interference screw, such a handle (10) permitting rotation of the screw tap (1) and engagement of a drilling tool (11) in each of the holes (2a, 3a) so as to produce said tunnels (5, 6) at sites that are spaced apart angularly, also in a predetermined manner.
  4. Instrument according to Claim 3, characterized in that the holes (2a, 3a) are formed in the handle (10) of the s crew tap (1) at an equal distance from the centre of the latter, hence from the centre of the interference screw (7) to be subsequently put in place.
  5. Instrument according to one of Claims 3 and 4, characterized in that the diameter of the holes (2a, 3a) formed in the handle (10) of the screw tap (1) and the diameter of the semicylindrical recesses (2, 3) which continue them are of different values depending on the case that is to be treated.
  6. Instrument according to one of Claims 3 to 5, characterized in that the screw tap (1) of which it is composed has a different diameter and length depending on the case that is to be treated.
EP04021515A 2003-10-02 2004-09-10 Instrument for preparation of a bone for an interference screw in ligament surgery Not-in-force EP1520534B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0311643A FR2860418B1 (en) 2003-10-02 2003-10-02 INSTRUMENT FOR THE INSTALLATION OF INTERFERENCE SCREWS IN THE FIELD OF LIGAMENTOPLASTY
FR0311643 2003-10-02

Publications (2)

Publication Number Publication Date
EP1520534A1 EP1520534A1 (en) 2005-04-06
EP1520534B1 true EP1520534B1 (en) 2006-09-06

Family

ID=34307426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04021515A Not-in-force EP1520534B1 (en) 2003-10-02 2004-09-10 Instrument for preparation of a bone for an interference screw in ligament surgery

Country Status (5)

Country Link
EP (1) EP1520534B1 (en)
AT (1) ATE338515T1 (en)
DE (1) DE602004002255T2 (en)
ES (1) ES2273137T3 (en)
FR (1) FR2860418B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2443795B (en) * 2006-10-06 2011-04-13 Dalmatic As Leads for use in orthopaedic surgery
FR2924596B1 (en) * 2008-09-12 2011-03-04 Tettra Trading Ltd FIXING DEVICE FOR LIGAMENTOPLASTY.
CN103006312B (en) * 2010-09-03 2017-11-03 张强 Minimally invasive bone fracture screw inserts opener
CN103315804A (en) * 2013-06-09 2013-09-25 无锡市华牧机械有限公司 Screw tap specially used in orthopaedics department

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5643269A (en) * 1990-08-24 1997-07-01 Haerle; Anton Externally threaded bodies for use as taps or screws
US5234430A (en) * 1991-12-18 1993-08-10 Huebner Randall J Orthopedic fixation screw and method
FR2735008A1 (en) * 1995-06-07 1996-12-13 Jbs Sa Surgical instrument for inter vertebral arthrodesis
US20030018337A1 (en) * 2001-07-17 2003-01-23 Davis Reginald J. Bone drill and tap combination

Also Published As

Publication number Publication date
FR2860418B1 (en) 2005-12-16
ES2273137T3 (en) 2007-05-01
DE602004002255T2 (en) 2007-04-05
FR2860418A1 (en) 2005-04-08
ATE338515T1 (en) 2006-09-15
EP1520534A1 (en) 2005-04-06
DE602004002255D1 (en) 2006-10-19

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